Sideros Jolie Forno Specification sheet

WOOD STOVE
Jolie
and
Jolie Forno
BASIC - CERAMICA
- PIETRA OLLARE
Instructions for Use and
Maintenance
GOOD HEAT

2
CONTENTS
1.0 Prior to installation
1.1 Warnings
1.2 Main features
1.3 Accessories
1.4 Technical data
1.5 Overall dimensions
1.6 Technical description
2.0 Installation
2.1 General rules
2.2 The flue
2.3 Connection to the flue
2.4 Specifications for the chimney pots
2.5 The depression
3.0 Operation
3.1 Warnings
3.2 Fuels
3.3 Adjustments
3.4 Switching on
3.5 Working in transition period
3.6 Working in winter
4.0 The wood
4.1 Choice of wood
4.2 Seasoning of the wood
5.0 Cleaning and maintenance
5.1 Cleaning and maintenance of the
flue
5.2 Cleaning and maintenance of the
stove
6.0 Warrantee
7.0 CE marking information
------------------------------------------------------------------------------------------------------------------------
1.0 PRIOR TO INSTALLATION
Dear Customer, thank you for having chosen a SIDEROS S.p.A. product.
This product, manufactured with attention to every detail, is designed to satisfy the safety
and operating requisites in the best possible manner.
1.1 WARNINGS
- The user must strictly follow the instructions in this instruction Manual.
- The responsibility of SIDEROS is limited to the supply of the appliance and the
manufacturer shall not accept liability in case of failure to observe the
instructions given in this Manual.
- In case of doubt, or for any clarification that may be required, the User is advised
to contact the dealer, who will provide all the information necessary for correct
installation of the appliance.
- Heating appliances running on solid fuels are extremely hazardous for children; it
is therefore prudent to take the necessary precautions to prevent them from
coming near the stove.
N.B. It is important to make sure the stove is transported in compliance with the
provisions of Presidential Decree 626/94 (safety standards). Also avoid
careless shifting and impact, as this can cause damage to the ceramics, glass
and the appliance frame.
1.2 MAIN FEATURES
wood burning stove with double combustion
supporting frame made of steel and aluminium sections;
grate made of self-cleaning refractory material (Jolie Basic version and Jolie Forno
model);
cast-iron grate (only on Jolie Ceramica and Pietra Ollare versions);
smoke circuit deviator for low fuel consumption and high heat output;

3
primary and secondary air regulation system;
Grate fitted with large panoramic self-cleaning ceramic glass door.
Cast-iron top with slots for hot air outlet (Convection);
Smoke circuit easily accessible for cleaning and periodic inspection;
Outer covering entirely in ceramic (Ceramic version);
Outer covering entirely in enamelled plate (Basic version);
Outer covering entirely in Pietra Ollare (Soapstone) (Pietra Ollare version);
Top made of cast-iron with a series of cooking hobs;
Fumes outlet at the top (rear -optional);
Multiple oven with precision thermometer (Jolie Forno model only).
1.3 ACCESSORIES
Before positioning the stove, check to make sure it is complete with all the accessories.
- poker;
- fumes collar;
- heat-proof glove;
- enamelled tray (Jolie Forno model only);
- the attached documentation (Warrantee, flue booklet, ANFUS booklet, service
centres booklet).
N.B. Read the attached documentation carefully and preserve it.
1.4 TECHNICAL DATA
MANUFACTURER
SIDEROS S.p.A.
41038 San Felice S/P(Italia)
MODEL
Jolie
Jolie Forno
VERSION
Basic - Ceramica -
Pietra Ollare
Ceramica -
Pietra Ollare
Flue gases exhaust diameter
(cm)
Ø12
Flue gases exhaust position
Top - Rear (OPTIONAL)
Rated power
in accordance with EN13240
(kW)
6.84
Hourly wood consumption at
Rated power (kg/h)
2.09
Overall dimensions
W x D x H (cm)
48 x 47 x 87
48 x 47 x 127
Room heating capacity (for buildings in which the insulation does not correspond to the
provisions for heat protection).

4
HEATABLE VOLUME with Rated power
Favourable conditions
145 m³
Normal conditions
90 m³
Unfavourable conditions
60 m³
1.5 OVERALL DIMENSIONS

JOLIE
FORNO

6
1.6 TECHNICAL DESCRIPTION
Jolie is designed to heat homes or improve insufficient heating, and suits any kind of
interior. The supporting frame is made of steel with aluminium sections which make the
appliance sturdy; the top, moulding, fireplace, oven (if present) and grate doors, and the
front are made of RAF enamelled cast iron.
On the top a series of 3 cast iron rims are mounted to be used as cooking tops and/or for
heating food.
The interior of the grate in the Jolie Basic versions is made of self-cleaning refractory
material with cast-iron grate and grate holder.
The Jolie Ceramica and Pietra Ollare versions can also be fitted with a grate made of
self-cleaning refractory material, but for this version a very thick cast-iron fireplace is also
available. In all three versions a grid-shaker command is fitted, hidden behind the ash pan.
The fireplace is fitted with a large ceramic glass door resistant to high temperatures
(700°C). This provides a suggestive view of the flames in the fireplace while at the same
time preventing sparks flying and release of smoke into the heated room. The fireplace
door, that of the oven (if present) and the ash pan door are airtight. Fuel is loaded by
opening the fireplace door from the RH to the LH. This can be done by releasing the handy
LEVER on the RH of the fireplace door (see Figures 1 and 2).
fig. 1 (mod. Jolie)
SERIES OF RIMS
GRATE DOOR
ASH PIT DOOR
ASH PIT
GRID-SHAKER
CONTROL
GRATE
SIDE PANEL
FUMES OUTLET
COLLAR

7
fig. 2 (mod. Jolie Forno)
2.0 INSTALLATION
2.1 GENERAL RULES
For installation of the stove, take into account the various practical considerations.
The walls adjacent to the stove must be made of bricks or concrete, or using non-
combustible materials or must be suitably protected with insulating materials.
The stove generates heat, especially near the fireplace; therefore, do not place any object
that is inflammable or very sensitive to heat (such as alcohol, paper, plastic objects, etc.)
near it.
The stove must be installed, duly respecting the minimum clearances, always ensuring the
safety distances from walls and furniture (see Figure 3).
If the floor is made of combustible material (for e.g. parquet), it must be protected by
means of a slab made of non combustible material placed under and around the stove, in
order to prevent overheating of the floor.
The metal tubes connected to the flue must always be at least 1 m, away from all
combustible material, except when specific protection devices are present (see existing
fire-prevention standards).
FUMES OUTLET
COLLAR
SIDE PANEL
OVEN
GRATE
GRID-SHAKER
CONTROL
ASH PIT
ASH PIT DOOR
GRATE DOOR
SERIES OF RIMS
OVEN DOOR

8
The wood burning stoves manufactured by SIDEROS are based on the principle of
convection; therefore it is necessary to ensure free air circulation around the stove without
obstructing it with walls or furniture. Correct convection will allow maximum heat exchange
through the fireplace walls while at the same time ensuring uniform temperatures, avoiding
overheating of the rooms.
fig.3 fig.4
For correct working, ensure that the quantity of air required is supplied (~20 m³/h)
indispensable for the fuel to burn completely without gas residues and at rated power.
Install the stove as close to the flue as possible, limiting the number of bends and
horizontal sections to the minimum.
After identifying the best possible position, unpack the stove by removing the cardboard
and inner protective packing and check to make sure the doors can be opened and closed
correctly.
2.2 THE FLUE
Remember that the flue is as important as the stove as regards correct and safe working.
If a flue is to be constructed, we recommend the choice of brickwork or stainless steel flues
in order to ensure that the conditions necessary for correct working of the stove are
respected (See Figure 4).
INSULATING
MATERIAL
AIR
INTAKE
INSULATING
MATERIAL
SAFETY
PLATFORM
SI
NO
NO
FLUE RESTING AGAINST A
WALL
FLUE MADE IN THE WALL
“U”-SHAPED STRUCTURE
RESTING AGAINST A WALL
APPOGGIATA ALLA PARETE

9
The installation must be done by qualified personnel in accordance with the
standards concerning the sector (UNI EN 1443 and UNI EN 10683).
However, if an existing brickwork flue is to be used, have it checked by a technician to
make sure it has suitable features and satisfies the following requisites.
- is sealed against fumes, water-proof and suitably isolated and insulated;
- is made using materials that can withstand normal mechanical stresses, heat, the action
of combustion products and their condensates;
- is at a suitable distance from combustible and inflammable materials;
- the internal cross-section is preferably circular. The rectangular or square cross-
sections must have rounded corners with radius at least 20mm;
- the internal cross-section must be constant, clear and independent;
- the rectangular cross-sections must have a maximum ratio of 1.5 between the sides.
As regards the cross-section and the height of the flue, respect the appliance
manufacturer’s instructions (see Table 1).
It is advisable to provide a chamber at the base of the flue for collecting the unburnt
material and condensate, to facilitate maintenance and cleaning (see Figure 10).
The smoke duct and the flue must receive the exhaust from a single heat generator (See
Figure 5a).
fig.5a
Existing laws forbid exhaust without a suitable flue. It is, however, advisable to have a
minimum flue height of 5 metres.
The base of the chimney stack must project by at least
60 cm beyond the other projecting points in a radius of
3 metres (see Figure 6) and its cross-section must not
be less than that of the stove outlet.
It is important to avoid choking which will obstruct the
discharge of flue gases, as indicated by the regulations
currently in force.
fig.5b
NO
SI
INNER PART MADE
OF STAINLESS
STEEL
INTERMEDIATE
PART MADE OF
MINERAL WOOL
OUTER PART
MADE OF
STAINLESS STEEL

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The Table below shows the sizing of the flue according to the actual thermal capacity.
Tab. 1
Thermal
capacity
Flue height less than
4 metres
Flue height between 4
and 6 metres
Flue height greater
than 6 metres
kW
Ø internal cm
Ø internal cm
Ø internal cm
up to 8.5
14
14
12
up to 9.5
16
14
12
up to 11.5
16
16
14
Up to 14
18
18
16
The use of insulated flues made of stainless steel makes it possible to optimize the
combustion in the fireplace of the stoves and reduce consumption as well as polluting
emissions.
Made of valuable materials using leading
technology, they represent an excellent
solution, and are distinguished by the
extremely easy installation, adaptability to
all architectonic requirements and a
concrete economic advantage.
They can be installed inside or outside
buildings, thanks to the effective insulation
system, which ensures optimum
performance of all conditions and do not
require additional construction works
during the installation.
Owing to the high quality of materials
used, they retain their original features
without alteration in the presence of
temperatures ranging from 500 °C to
occasionally maximum points of approx.
750 °C.
The intermediate insulation consists of a
layer of a 50mm thick layer of high density
mineral wool which ensures a high degree
of insulation (see Figure 5b).
They are produced in a large range of
diameters and include al the special
elements and accessories for correct and
easy installation. fig.6
IMPORTANT
The sizing and design must be done by
the flue manufacturers or specialist dealers.
CHIMNEY
POT
BEND WITH
INSPECTION DOOR
INSULATED FLUE
INSPECTION

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2.3 CONNECTIONS TO THE FLUE
The stove is set up for a top flue gases outlet connection. The collar is present in the ash
pan inside the fireplace and must be mounted and fixed using the screws provided on the
head.
To use the rear flue gases outlet, follow the instructions given below:
- remove the rear flue gas outlet plug by slackening the screws;
- remove the collar from the upper flue gases outlet by slackening the screws and
position it in place of the rear flue gases outlet plug;
- block the collar using the fixing screws, taking care to position the seal correctly;
- then block the flue gases outlet plug in the upper flue gases outlet position, tightening
the screws all the way.
With the upper flue gases outlet, for optimum draft, the first vertical outlet section from
the stove must be at least 1m long. The stove –flue connection must also have a
horizontal section maximum 1m long. For horizontal sections more than one metre long,
every metre of pipe length must slope by at least 5 cm.
In case of rear flue gases outlet, the inlet to the flue must be at the flue gases outlet, to
avoid bent pipes that will reduce the stove draft and slow down flue gases discharge,
consequently resulting in its malfunctioning.
Check the sealing of the pipes, to ensure there is no leakage at the joints, and make sure
that the tube section that enters the flue does not obstruct the flow of flue gases.
It is forbidden to use flexible metal tubes, fibro-cement or aluminium tubes for connections
with the flue.
The connection must be made using tubes made of steel or iron enamelled/painted in
suitable thickness and sealed, if necessary, using mastic for boilers (see Figure 7).
Use the minimum number of bends possible, trying to limit it to two; in any case,
open 45° bends are recommended.
Take great care while making the connection on the flue, making sure the connecting tube
penetrates by at least 5 mm into the wall of the flue without however obstructing a part of it
(see Figure 7).
The connecting tube must be easily accessible for inspection, to allow removal of soot and
cleaning.
Avoid the use of horizontal sections, as far as possible.
The connecting tube must have a constant cross-section. A variation in the cross-section is
only permitted at the stove connection.
In no case can reductions be used at the flue gas connection, and other air ducts or
pipes used for installation purposes must not be allowed to pass through the
connecting tube, even if they are oversized.
For stoves that use Ø12 cm tubes, it is advisable to install the down pipe connections i.e.
with the male opening towards the stove and the female opening towards the chimney pot,
in such a manner that the condensate that may be formed when the stove is switched on
will fall freely into the fireplace and dry up.

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For stoves which use Ø15 cm tubes, install the cup-shaped tube connections and proceed
in reverse of the description given above for the Ø12 cm tubes.
For the horizontal sections, the welding must face upwards, there must be at least 50 cm
between the duct and the ceiling and these must be fixed to the ceiling.
For the vertical sections of the tube, it is important to bear in mind that a wooden floor
crossing over, if present, must be absolutely insulated, to prevent excess temperatures
from damaging the structure and leading to risk of fire.
fig.7 fig.8
IMPORTANT
On all versions where the flue gas outlet is more than Ø14 cm, the thickness of the
tube connected to the flue must be 2 mm, because of the high thermal capacity the
models are able to develop.
It is therefore advisable to avoid using tubes with reduced thickness in the
aforementioned models.
2.4 SPECIFICATIONS FOR CHIMNEY POTS
The dimensions of the chimney pot vary
according to the type of flue.
It must be placed in the full wind position
with the essential feature of having the
flue gas outlet cross-section at least
double that of the flue.
We recommend the use of a chimney
stack with the windbreaker form with
profiles that allow the Venturi effect, i.e.
dragging the fumes outside the flue also
in the presence of strong horizontal
winds (see Figure 8).
If the chimney pot is placed at a distance
of less than 3 m from the highest walls of
the factory, its construction must be
raised above the level of the highest roof
(see Figure 9). fig.9
Always refer to the fire-prevention regulations applicable and contact an expert in the
sector.
SEAL
YES
YES
YES
NO
NO

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The chimney pot must satisfy the following requisites;
- the internal cross-section must be equivalent to that of the flue;
- the free outlet cross-section must be at least double the internal cross-section of the
flue;
- it must be constructed in such a way as to prevent rain, snow and foreign bodies from
penetrating the flue and to ensure flue gas exhaust in all wind conditions;
- be positioned in such a way as to ensure adequate dispersal of flue gas, and, in any
case, outside the so-called backflow area, which prevents the formation of counter-
pressures.
2.5 THE DEPRESSION
The draught is the physical condition necessary so that the flue gases produced by
combustion are extracted by the flue and dispersed through the chimney pot.
A good draught is indispensable for the correct working of your stove to obtain excellent
performance.
With a poor draught, smoke may leak out at the door opening, there may be incomplete
combustion of the wooden logs and the ceramic door glass will become dirty.
One possible solution for this problem is to increase the height of the flue or to install a
barometric exhaust on the chimney pot (see Figure 11). This, working without the aid of
a motor, will restore the draught to the required limits.
fig.10 fig.11
It is important to make sure the inspection hatch, provided for periodic cleaning of the flue,
is airtight (see Figure 10), since filtration of air through this hatch can lead to a
temperature drop, thereby preventing regular backflow of exhaust fumes into the flue.
For correct working, the flue gases output temperature measured at the chimney pot must
not be less than 90 °C.
Make sure the flue draught is between 0.10 and 0.15 mBar, if it is lower, check to make
sure it is in compliance with the applicable standard (UNI EN 1443 and UNI EN 10683).
Compliance with these standards is indispensable for proper working of modern high
performance appliances which emit flue gases at a temperature distinctly lower than that of
low performance old world appliances.
Flue
inspection door
barometric exhauster

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To check the flue draught, consult the following Table.
Tab 2
STOVE MODEL
Jolie
Jolie Forno
Rated power according to EN13240
6.84 kW
6.84 kW
Exhaust temperature
341 °C
341 °C
Exhaust depression at max. power
0.12 mBar
0.12 mBar
ATTENTION
An excessive draught (higher than 0.20 mBar constant over time) is certainly cause
of damage and excessive wear of the stove, in particular of the fireplace and the
fumes circuit, in addition to poor heat yield.
For problems encountered, contact the dealer, after having checked the working
efficiency of the flue.
3.0 OPERATION
3.1 WARNINGS
- Given the high temperatures developed by the stove, adults and children must
take great care with the surfaces of the stove. Children, in particular, must be
supervised.
- In case of an emergency, close all the regulators, thereby suffocating the
combustion.
- Do not pour water or other substances on the stove while it is working or in the
cooling phase, to avoid breakage due to thermal shock.
- Do not place inflammable or heat-sensitive objects near the stove, and always
use the special heat-proof glove provided for all operations.
3.2 FUELS
The only fuel that must be used with a SIDEROS stove is wood, which must be seasoned
properly. The logs must first be cut to the right length and then split into halves.
The ideal quantity of fuel with the door closed is indicated in the Table below.
Tab. 3
TYPE OF FUEL
kg
No. pcs
Wood
1.8
2 large
3 small
Seasoning for at least two years is recommended, and the wood must be stacked to allow
free air circulation to facilitate drying and prevent the formation of moisture.
Burning damp or poorly seasoned wood will produce a minimum part of the heat
that can be obtained from the stove, increasing the formation of creosote to a
considerable extent.

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Also see Table 5 which shows the features of the most common types of wood.
UNSEASONED WOOD DOES NOT HEAT, DIRTIES THE FLUE AND POLLUTES THE
ENVIRONMENT.
WARNINGS
- For operation at the night, place big hard logs of wood in the stove. The
combustion will thus be slow and the embers will last until the next morning.
- Do not use household wastes like plastic or similar materials.
- Do not use branch wood such as fruit crates, etc. for long periods since a lot of
heat is developed during combustion, leading to overheating.
- In accordance with the fire-prevention regulations, it is very important to keep the
wood away from the stove to prevent possibility of a fire.
3.3 ADJUSTMENTS
All Jolie Stoves have with the same double air flow regulation system: the primary air
valve and the secondary air valve.
The primary air valve (see Figures 12 and 13) is located in the middle of the ash pan
door. This valve allows air flow downwards, through the ash pan area, the grid holder and
grid, towards the fuel. The primary air (AP) is essential for combustion. Therefore make
sure the ash pan placed immediately below the grid is not filled excessively, since the ash
can obstruct inlet of primary air.
The flow is adjusted by turning the knobs present in the middle of the ash pan door to the
RH or the LH.
The primary air is opened to the maximum position when the knob is turned completely to
the RH (see Figure 12), while the valve is closed by turning the upper knob completely to
the LH (see Figure 13).
fig.12 fig.13
The secondary air valve (see Figure 14) is located in the upper part of the fireplace door
and allows air flow from above, improving combustion considerably. This additional air flow
also keeps the panoramic glass clean.
PRIMARY AIR
MAX OPENING
PRIMARY AIR
CLOSED
CHIUSA

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The air flow is adjusted by means of the “knob” provided in the upper part of the fireplace
door. turn the knob clockwise to open the valve and anticlockwise to close it.
For proper combustion, to avoid overheating of the stove and higher fuel consumption, it is
advisable to make the adjustments as specified in Table 4.
The 27 L multiple oven in enamelled steel, (see Figure 15), present only on the Jolie
Forno model, has an enamelled panoramic door with tempered glass door resistant to high
temperatures. The internal temperature is displayed on the precision thermometer
positioned on the oven glass door.
fig.14 fig.15
The oven is heated by forced conveyance of flue gases on its jacket, ensuring a
temperature ranging from 50 a 350 °C (depending on the fuel loading).
3.4 SWITCHING ON
During these operations, pay special attention to the refractory tiles of the fireplace
(in the versions where present) which can break if subjected to strong blows.
Remember that improper use of the stove with excessive fuel load leads to its rapid
deterioration; therefore it is advisable to use a quantity of fuel suitable for the heating
capacity of the appliance (see Table 3).
Always take great care and use the heat-proof glove supplied for loading fuel and
inspecting the ash pan.
Part of the heating produced by the appliance is obtained by convection through the air
passages situated between the stove body and the side panels made of ceramic or
enamelled plate and subsequently through the slots made on the cast-iron top, and partly
by radiation, using the heat that comes out of the glass door, the outer ceramic or
enamelled plate walls and the parts made of cast-iron.

17
ATTENTION
When switching the stove on the first time, follow the indications given below:
- open the windows or ventilate the room properly;
- check to make sure there are no foreign bodies inside the grate and/or the ash pan;
- shut the secondary air and open the primary air to the maximum;
- insert two or three sheets of paper or 2 kindling pellets (such as Diavolina) in the
fireplace;
- if using paper, place two thin pieces of wood on the paper and then place 2 bigger
wooden logs on top;
- light the paper below the wood and then shut the fireplace door;
- if using “Diavolina”, wait until it lights up completely, before placing the thin pieces of
wood and the 2 larger wooden logs on these (this facilitates initial movement of the air
flow inside the fireplace);
- wait a few seconds for the flame to become steady, and then open the secondary air
supply by 1 turn;
- after lighting the fire, regulate the primary air and the secondary air according to the
power required;
- select the combustion air adjustment combinations according to Table 4.
N.B. It is always advisable to keep the Secondary air open at least through one turn
to keep the ceramic glass clean and prevent overheating of the front in the
area above the fireplace door.
However, in case of poor flue draught, NEVER EXCEED the amount of fuel for
lighting the stove as this can cause excessive smoke resulting in blockage and
leakage of smoke through the adjustment passages.
During the normal working of the stove always keep the fireplace door shut.
NEVER USE easily inflammable liquids like benzene or alcohol for lighting the fire.
For the first 2-3 times, build only moderate fires to allow the stove to heat up
gradually and uniformly without temperature variations.
DURING THE WORKING OF THE STOVE, NEVER LEAVE THE ASH PAN DOOR
OPEN, AS OTHERWISE THE WARRANTEE WILL BE INVALIDATED.
The ash pan is sized to hold all the ash from the grate thus preventing it spilling into the
container compartment.
N.B. After lighting the stove, place the fuel when there is a bed of embers, not
flames, inside the fireplace. This will help prevent smoke coming out during
the operation and also optimize fuel consumption.
3.5 WORKING IN THE TRANSITION PERIOD
During the off-season, the draft may be affected by the external temperatures that easily
exceed 15°C: it is therefore advisable to clean the grid thoroughly before lighting the fire to
allow greater air flow under the grid.

18
Use smaller quantities of wood, and clean the grid frequently using the poker and “revive”
the embers by shaking the grid using the command provided, to ensure better working of
the stove.
3.6 WORKING IN WINTER
Before lighting the stove, always clean the grid to remove ash. If there are embers in the
fireplace, spread these out uniformly on the grid so that they come into contact with the
primary air evenly: this will ensure better performance. After lighting the stove, adjust the
primary air according to the heat required and the fuel inserted (lots of fuel = + primary air
and –secondary air; little fuel = - primary air and + secondary air).
To keep the stove in perfect working condition, follow the indications in Table 3 and
in the Table below.
Tab. 4
TYPE OF FUEL
Wood
POWER ADJUSTMENT
Min
Av.
Max
PRIMARY AIR
¼ open
½ open
Comp. open
SECONDARY AIR
1 turn
2 turns
2 turns
4.0 THE WOOD
4.1 CHOICE OF WOOD
The wood for burning in the stove must, first of all, be well seasoned. Apart from this, the
choice will depend on the availability of wood and its cost.
Wood can be divided into two categories “hard” and “soft”, depending on the origin. Hard
wood is obtained from non-coniferous trees, usually deciduous trees, such as, oak, beech,
walnut. Soft wood is obtained from conifers or evergreens such as pine, fir, larch.
Hard woods are usually thicker and less resinous than soft woods; therefore the burn
slowly, producing longer lasting heat.
Soft woods burn faster producing stronger heat, making them an excellent choice also for
starting the fire; but using these as the main fuel means having to reload fuel more often.
Soft woods produce more creosote, which means the stove will require cleaning more
often.
To obtain a hotter longer lasting fire the best option is to mix 20% of soft wood with 80% of
hard wood.
Apart from the capacity for combustion, the types of woods belonging to the two categories
have specific features which deserve consideration.
For example, woods with long smooth fibres, such as beech and red oak, are easier to split
than woods with shorter twisted fibres.
Some woods, including some soft woods, produce a large amount of smoke; others
contain moisture pockets which cause crackling during combustion, producing spreading
sparks.
Many fruit trees, like the apple tree, give a pleasant fragrance as they burn.

19
The Table below shows some of the features of the most common types of wood.
Tab. 5
TYPE OF
WOOD
QUANTITY OF
HEAT
EASE OF
COMBUSTION
FLUE GAS
DENSITY
EASE OF
CUTTING
HARD WOODS
Maple
high
good
low
good
Birch
high
good
low
good
Cherry
medium
good
low
good
Beech
high
good
low
good
Ash
high
good
low
good
Walnut
medium
good
low
good
Elm
medium
medium
medium
poor
Poplar
low
good
medium
poor
Oak
high
good
low
good
SOFT WOODS
Fir
low
medium
medium
medium
Larch
medium
good
medium
good
Pine
low
medium
medium
medium
The best quality woods are: Ash, beech, birch, oak, white beech, maple, all woods
with high calorific value, easy combustion, little smoke production and easy to cut.
4.1 SEASONING THE WOOD
One of the most frequent errors that are made while burning wood is that of burning wood
that is still green or has not yet been seasoned. More than half the weight of freshly cut
wood consists of water.
It takes at least nine months to season wood, and it is better, to leave the wood to season
for at least two years, if possible. Seasoned wood loses over 60% of its moisture and
therefore will give more heat and be easier to light. It will also be lighter to handle. Green
wood can contain up to 75% of moisture with respect to its weight.
Wood is considered as dry when its contains 15-20% moisture (conditions that can
be reached in 18-24 months of seasoning).
The percentage of moisture affects the calorific value of the wood to a considerable extent,
since a part of the heat given out is used for evaporating the water contained in it and is
dispersed in the flue together with the steam produced.
Remember that old wood does not always mean dry wood. Drying wood depends not only
on the weather but also on the right position and preservation during the seasoning. Wood
stored for too long without protection or in damp and badly ventilated places will most
probably be rotten rather than dry.

20
The Table below shows the average drying times to be respected for obtaining good
firewood. Tab. 6
AVERAGE PERCENTAGE OF MOISTURE IN WOOD
Drying time
Wood in open air
3 months after cutting
blocks
logs
blocks
logs
0 (green wood)
75%
76%
75%
78%
3 months
41%
67%
44%
61%
6 months
37%
46%
29%
35%
9 months
33%
38%
26%
28%
12 months
26%
35%
25%
27%
18 months
18%
27%
17%
17%
24 months
16%
24%
16%
14%
30 months
13%
24%
15%
14%
Using wood dried for at least one year can halve the quantity necessary for heating.
5.0 CLEANING AND MAINTENANCE
Thorough maintenance of the stove and the flue will help maintain the high efficiency and
safety.
ATTENTION
- Before carrying out any cleaning or maintenance operation, wait for the stove and
the connecting pipes to the flue to cool down.
- Do not use inflammable products for cleaning operations.
5.1 CLEANING AND MAINTENANCE OF THE FLUE
Creosote is a tarry liquid which appears in a duct because of poor combustion,
simultaneously with a low temperature of the duct; in case of formation of creosote, it is
advisable to improve insulation of the exhaust duct.
Continuous accumulation of this substance along the entire duct can, if ignited by a flame,
lead to self-combustion at very high temperature, with consequent danger of a fire.
The connecting pipes and the flue must therefore be checked and cleaned at least once
during the season, or more, if necessary.
WARNINGS
- A clean flue in good condition will ensure safety for the home and satisfactory
working of your SIDEROS stove.
- The flue must, therefore be checked and cleaned by qualified personnel, at least
once a year, before starting to use the stove.